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objective c - Record audio on iPhone with smallest file size

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objective c - Record audio on iPhone with smallest file size

I want to record audio with iPhone and then upload it to server.

I could record the audio, but my question is about which format should I use to record audio, so that the Recorder will result a file with smallest file size.

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Here are the results for few encoding supported by iPhone. Size of audio file in KB of duration 10 sec.

kAudioFormatMPEG4AAC : 164,

kAudioFormatAppleLossless : 430,

kAudioFormatAppleIMA4 : 475,

kAudioFormatULaw : 889,

kAudioFormatALaw : 889,

Among these kAudioFormatMPEG4AAC is having smallest size.


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